SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field.
SJR is a prestige metric based on the idea that not all citations are the same. SJR uses a similar algorithm as the Google page rank; it provides a quantitative and a qualitative measure of the journal’s impact.
The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years.
© Thomson Reuters Journal Citation Reports 2015
To calculate the five year Impact Factor, citations are counted in 2014 to the previous five years and divided by the source items published in the previous five years.
© Journal Citation Reports 2015, Published by Thomson Reuters
Part B: Biochemistry and Molecular Biology of Comparative Biochemistry and Physiology. This journal covers biochemical and molecular biology aspects of metabolism, enzymology, regulation, nutrition, signal transduction, promoters, gene structure and regulation, metabolite and cell constituents, macromolecular structures, adaptational mechanisms and evolutionary principles.
Comparative Biochemistry & Physiology, with its four journals, receives editorial direction from all the major societies in the field (European Society for Comparative Physiology and Biochemistry, the Japanese Society for Comparative Physiology and Biochemistry, Canadian Society of Zoologists (CBP Section), the Society for Experimental Biology, the Society for Integrative and Comparative Biology (formerly the American Society for Zoologists), the Australian and New Zealand Society for Comparative Physiology and Biochemistry, the South American Society for Comparative Physiology & Biochemistry, the Russian Physiological Society, and the Chinese Association for Physiological Sciences)